
PIC18FXX39
DS30485A-page 18
Preliminary
2002 Microchip Technology Inc.
PORTE is a bi-directional I/O port.
RE0/RD/AN5
RE0
RD
AN5
8
25
I/O
ST
TTL
Analog
Digital I/O.
Read control for parallel slave port
(see also WR and CS pins).
Analog input 5.
RE1/WR/AN6
RE1
WR
AN6
9
26
I/O
ST
TTL
Analog
Digital I/O.
Write control for parallel slave port
(see CS and RD pins).
Analog input 6.
RE2/CS/AN7
RE2
CS
AN7
10
27
I/O
ST
TTL
Analog
Digital I/O.
Chip Select control for parallel slave port
(see related RD and WR).
Analog input 7.
VSS
12, 31 6, 31
6, 29
P
—
Ground reference for logic and I/O pins.
VDD
11, 32 7, 28,
29
7, 28
P
—
Positive supply for logic and I/O pins.
AVSS
—
30
—
P
—
Ground reference for analog modules.
AVDD
—
8
—
P
—
Positive supply for analog modules.
NC
—
13
12, 13,
33, 34
—
These pins should be left unconnected.
TABLE 1-3:
PIC18F4X39 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
DIP
QFN TQFP
Legend: TTL = TTL compatible input
CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels
I
= Input
O= Output
P
= Power
OD = Open Drain (no P diode to VDD)